/ Dictionary / Index Q quartet: Meaning and Definition of Find definitions for: quar•tet Pronunciation: (kwôr-tet'), [key] — n. any group of four persons or things. an organized group of four singers or players. a musical composition for four voices or instruments. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quartet (Thesaurus) quarter-wave plate quartic Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language